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0 CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate 4 2480 — Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Protect ID Cal Fuels Sampled 10-07-04 <br /> of Northern California Referenct Number 7440 Received 10-08-04 <br /> 837 Shaw Road Sample L esciiption Water Extracted 10-12-04 <br /> Stockton CA 9r,t15 Sample Prep/Analysis Method EPA 5030/8015 8L20 Analyzed 10-12-04 <br /> Attn Tim Ctlelinr Lab Numbers 7440-6W, 7W 8W, 9W 10W Reported 10-18-04 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE !D SAMPLE ID <br /> MW 6 MW 7 MW 8 MW 9 MW 10 <br /> 100704 100704 100704 100704 100704 <br /> (ug/L) (NgIL) (ug/L) (u91L) (ug/L) (ug1L) <br />' BENZENE 050 ND ND ND ND ND <br /> TOLUENE 050 ND ND ND ND ND <br /> IETHYL BENZENE 050 ND ND ND ND ND <br /> TOTAL XYLENES 050 ND ND ND ND ND <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 97 ND ND ND ND <br />' Report Limit Multiplication Factor 1 1 1 1 1 <br /> 1 <br /> 1 <br /> Surrogate% Recovery Flo 111%1PID 106% FID 477°/iPID lOi6 Flo 256%1PID 9886 Fib 942%/PID 948% FID 972%1PIo 985% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br />' Practical Quantitation Limit M Reporting Limit x Report Limit Multiplication Factor <br /> APPROVED BY e6z a APPROVED BY <br /> Clan J Cone Ja es -Phllkps <br /> Laboratory Manag r boratory Director <br />